MUS. CCMP. ZOOU LinRARY B R A J MAR 1 8 1985 I O R.;ifc^ iiseiim of Comparative Zoology us ISSN 0006-9698 Cambridge, Mass. 21 February 1979 Number 452 LIZARDS OF THE SCELOPORUS ORCUTTI COMPLEX OF THE CAPE REGION OF BAJA CALIFORNIA William P.Hall'-and Hobart M. Smith' Abstract. Sceloporus orcuiii licki as hitherto defined is shown to embrace two cryptic species, neither of which is subspecific in relation to the allopatric S. orcutti: an arboreal species. 5. licki. and a petricole, S. hunsakeri sp.n., from 3 mi. E of San Bartolo (holotype MVZ 73.570); both are restricted to the Cape region of Baja California. All three species, 5. orcuiii. S. licki and S. hunsakeri have identical 2n = 34 (XY 6 ) k.ar>'otype patterns, but differ in numerous other respects. In these three species, the most succinctly diagnostic character states are: presence of a dorsolateral light stripe in 5. licki only. 59 or fewer dorsal scales plus femoral pores in most (96% of 27) S. orcutti. and 61 or more in most 5. hunsakeri (98% of 61). INTRODUCTION Field work in 1969 indicated that the Cape Region of Baja California (the area south of the Isthmus of La Paz) is inhabited by three distinct species oi Sceloporus which are broadly sympatric and frequently syntopic with one another (Figs. I, 2). Two of the three species, Sceloporus licki Van Denburgh and a species we describe here, are sufficiently similar to one another and to 5'. orcutti Stejneger that Smith (1939) considered them variants of a single race, S. orcutti licki. However, HalTs discovery in 1969 that the licki variant was arboreal and the other petricolous prompted reexam-ination of material from Baja California Sur. Specimens of the unnamed taxon have been available in museums since 1890. 'Department of Environmental. Population and Organismic Biology, University of Colorado Boulder, Colorado 80309 -Current Address: Department of Genetics University of Melbourne, Parkville, Victoria 3052, Australia
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